Material question - how to make this reflective?
The problem is the emissive shader doesn't really work well with the glossy. What I think is happening is the emissive texture is taking all of the light that is reflecting into the camera. It is basically bleaching out the ability for the light to reflect and is making it difficult if not impossible to see the small amounts of light reflecting off. to fix this, I recommend that you basically reduce the amount of emissive compared to the glossy so that it's not for the lack of a better word overshadowed. I did a test render here. It appears to work but it might not be exactly what we're looking for